UCF300 Series 4-Bolt Flange Bearing Units

UCF300 Series 4-Bolt Flange Bearing Units

Heavy duty cast iron 4-bolt square flange bearing units with setscrew locking, shaft bore 25–140 mm. Maximum radial load capacity in the standard cast iron 4-bolt flange range — for mining, cement, and large industrial frame drives. New-client samples 1–5 pcs at sample price. Multi-model orders from USD 1,500. Retail 1–2 pcs not accepted. Engineering drawings required — catalogue for reference only.

MOQ: 50 pcs. Minimum order value USD 1,500; mixed orders and trial quantities welcome.

SKU: GBC-UCF300 Categories: , Tags: , , , ,
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UCF300 Series 4-Bolt Flange Bearing Units — Heavy Duty, Setscrew Locking, 25–140 mm

The UCF300 series represents the maximum radial load capacity available in a cast iron four-bolt square flange configuration, scaling from 25 mm (UCF305) to 140 mm shaft diameter (UCF328). At the upper end of the series, units weigh up to 90 kg, reflecting the mass of flange plate and housing required to maintain structural integrity under the bending moments generated by large shaft overhangs and heavy belt tensions when the bearing is mounted on a vertical panel. The UCF300 series is the four-bolt flange equivalent of the UCP300 pillow block and shares its UC300 series insert bearing, giving it the same maximum load rating in the flange mounting format.

UCF300 series heavy duty 4-bolt flange bearing unit cast iron setscrew locking 25 to 140mm

Heavy Duty Flange — Design Philosophy

The UCF300 flange plate and housing body are cast to a fundamentally heavier cross-section than the UCF200 and UCFX00. The increased plate thickness raises the second moment of area of the flange mounting face, reducing angular deflection of the housing relative to the mounting panel under eccentric radial loads. For large shaft diameters where the overhang moment from a cantilevered sprocket or impeller is significant, this structural rigidity directly contributes to maintaining bearing alignment in service.

The UCF300 series uses metric bore only — no inch bore variants. The bore size is encoded directly in the model number: UCF305 = 25 mm, UCF328 = 140 mm. This makes international procurement unambiguous from the model number alone.

UCF300 heavy duty 4-bolt flange dimensional drawing L J A2 A1 A N B S Z specifications

Key Features

⚙

Maximum Load Cast Iron Flange Plate

Heaviest flange cross-section in the standard 4-bolt cast iron range. From UCF305 (1.2 kg) to UCF328 (90 kg) — full coverage for the heaviest four-bolt flange applications.

🔧

Proven Setscrew Retention

Dual setscrews at 120° — same geometry as UCF200 and UCFX00. No crew retraining required when scaling up from medium duty.

↔

UC300 Insert Bearing

Significantly higher C and C0 ratings than UC200 equivalents. Wide inner ring accommodates axial float in thermal-expansion-significant installations.

▭

Hollow Base Standard / Solid Base Available

Hollow base standard. Solid base (SB) available — recommended for UCF316 and above where bolt-circle loads are highest.

📏

Pure Metric Bore Range

Metric bore only. Model suffix = bore in mm: UCF305 = 25 mm, UCF328 = 140 mm. No inch variants.

💧

Re-lubrication Accessible

Grease fitting at 45° standard; 90° fitting on request for large units where side access is restricted.

Full Dimensional Specifications

Unit No. d mm L mm J mm A2 mm A1 mm A mm N mm B mm S mm Z mm Bolt kg
UCF305 25 110 80 16 13 29 16 38 15 39 M14 1.20
UCF306 30 125 95 18 15 32 16 43 17 44 M14 1.80
UCF307 35 135 100 20 16 36 19 48 19 49 M16 2.20
UCF308 40 150 112 23 17 40 19 52 19 56 M16 2.90
UCF309 45 160 125 25 18 44 19 57 22 61 M16 3.50
UCF310 50 175 132 28 19 48 23 61 22 67 M20 4.80
UCF311 55 185 140 30 20 52 23 66 25 71 M20 5.60
UCF312 60 193 150 33 22 56 23 71 26 78 M20 6.70
UCF313 65 208 166 33 22 58 23 75 30 78 M20 7.80
UCF314 70 226 178 36 25 61 25 78 33 81 M22 10.10
UCF315 75 236 184 39 25 66 25 82 32 89 M22 11.10
UCF316 80 250 196 38 27 68 31 86 34 90 M27 12.80
UCF317 85 260 204 44 27 74 31 96 40 100 M27 15.40
UCF318 90 280 216 44 30 76 35 96 40 100 M30 19.00
UCF319 95 290 228 59 30 94 35 103 41 121 M30 20.60
UCF320 100 310 242 59 32 94 38 108 42 125 M33 25.70
UCF321 105 310 242 59 32 94 38 112 44 128 M33 25.60
UCF322 110 340 266 60 35 96 41 117 46 131 M36 38.00
UCF324 120 370 290 65 40 110 41 126 51 140 M36 50.00
UCF326 130 410 320 65 45 115 41 135 54 146 M36 66.00
UCF328 140 450 350 75 55 125 41 145 59 141 M36 90.00

→ Scroll horizontally to view all columns. Catalogue dimensions for reference only — engineering drawings required before order.

Metric bore only — no inch bore variants. Solid base: suffix SB. Model number suffix = bore in mm.

UCF300 heavy duty 4-bolt flange bearing unit mining conveyor cement large shaft panel mount

Applications

⛏

Mining & Quarry Panel-Frame Drives

Head pulley and drive shaft supports on vertical panel-frame conveyors in mining and quarry operations where shaft diameters of 80–140 mm and sustained heavy belt tensions require UCF316–UCF328 capacity.

🏛

Cement Plant Vertical Frame Supports

Bucket elevator and clinker conveyor shaft supports on vertical frame structures in cement plants where abrasive dust, high ambient temperature, and heavy cyclic loads combine.

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Large Fan & Blower Frame Mounts

Large centrifugal fan shaft supports on vertical fan casing panels in power station, process plant, and industrial ventilation systems where shaft diameters reach UCF316–UCF320 range.

🌿

Agricultural Equipment Large Frame Drives

Main threshing cylinder and straw walker shaft supports on large combine harvester vertical frame panels.

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Aggregate Processing Vertical Frames

Vibrating feeder and screen drive shaft supports on vertical side-frame structures where impact loads combined with belt pull require maximum flange housing stiffness.

▶

Bulk Terminal Panel Drives

Stacker-reclaimer and ship unloader conveyor drive shafts on vertical structural steel panels where shaft sizes reach UCF320–UCF328 territory.

📦 MOQ & Order Information

  • Standard parts: quantity-based MOQ applies per model number.
  • High-value / large items: minimum order by USD order value.
  • New-client samples: 1–5 pcs available at sample price for first-time buyers.
  • Multi-model combines: aggregate orders of USD 1,500 or more across models accepted.
  • Special materials / processes: subject to process MOQ — confirm at inquiry stage.
  • Retail (1–2 pcs): not accepted. Minimum sample order is 1–5 pcs at sample pricing.

Engineering drawings must be submitted and approved before order confirmation. Catalogue dimensions are for reference only.

GBC 4-bolt flange bearing units heavy duty UCF300 range large bore mounted bearing

Frequently Asked Questions

Does UCF300 have inch bore variants?

No — metric bore only. Bore size = model suffix: UCF305=25 mm, UCF328=140 mm.

What is the maximum shaft size?

UCF328 = 140 mm shaft, 90 kg, M36 mounting bolts.

Is UCF300 dimensionally equivalent to UCP300?

Same UC300 insert bearing. Housing dimensions differ — flange plate vs pillow block base.

What is the MOQ?

Standard parts: quantity-based MOQ. Samples 1–5 pcs. Multi-model from USD 1,500. Retail 1–2 pcs not accepted.

Request a Quote for UCF300 Series

Provide shaft diameter, radial and thrust load estimates, operating speed, and daily running hours. Contact us.

Heavy duty cast iron 4-bolt square flange bearing units with setscrew locking, shaft bore 25–140 mm. Maximum radial load capacity in the standard cast iron 4-bolt flange range — for mining, cement, and large industrial frame drives. New-client samples 1–5 pcs at sample price. Multi-model orders from USD 1,500. Retail 1–2 pcs not accepted. Engineering drawings required — catalogue for reference only.

MOQ: 50 pcs. Minimum order value USD 1,500; mixed orders and trial quantities welcome.

Contact Us

Email

sales@australia-drive.com

stuart_hamill@generalbearing.com.au

Tel: +61 3 9070 7991

SKU: GBC-UCF300 Categories: , Tags: , , , ,

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